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A4402 Datasheet

Part Number A4402
Manufacturers Allegro Micro Systems
Logo Allegro Micro Systems
Description Constant On-Time Buck Converter
Datasheet A4402 DatasheetA4402 Datasheet (PDF)

A4402 www.DataSheet4U.com Constant On-Time Buck Converter with Integrated Linear Regulator Features and Benefits ▪ 2 MHz switching frequency ▪ Adjustable soft start timer ▪ Watchdog input ▪ Power-on reset output ▪ Adjustable 2% buck regulator ▪ Adjustable 2% linear regulator ▪ Enable input ▪ 6 to 50 V supply voltage range ▪ Overcurrent protection ▪ Undervoltage lockout (UVLO) ▪ Thermal shutdown protection Description The A4402 is a power management IC that combines a 2% constant on-time buck r.

  A4402   A4402






Part Number A4409
Manufacturers Allegro Micro Systems
Logo Allegro Micro Systems
Description Adjustable Frequency Buck or Buck-Boost Pre-Regulator
Datasheet A4402 DatasheetA4409 Datasheet (PDF)

A4409 Adjustable Frequency Buck or Buck-Boost Pre-Regulator with 2 LDOs, Window Watchdog Timer, and NPOR FEATURES AND BENEFITS • Automotive AEC-Q100 qualified • VIN operating range from 3 to 36 V, with 40 V maximum • Buck or buck-boost pre-regulator (VREG) • Adjustable PWM switching frequency: 250 kHz to 2.4 MHz • PWM frequency can be synchronized to external clock • Two 5 V internal LDO regulators with foldback short- circuit protection • Power-on reset (NPOR) with fixed delay of 22.5 .

  A4402   A4402







Part Number A4408
Manufacturers Allegro Micro Systems
Logo Allegro Micro Systems
Description Adjustable Frequency Buck or Buck-Boost Pre-Regulator
Datasheet A4402 DatasheetA4408 Datasheet (PDF)

A4408 Adjustable Frequency Buck or Buck-Boost Pre-Regulator with a Synchronous Buck, 3 Internal LDOs, Watchdog Timer, NPOR, and FF0/FF1 FEATURES AND BENEFITS • Automotive AEC-Q100 qualified • 2.8 to 36 VIN operating range, 40 VIN maximum • Buck or buck-boost pre-regulator (VREG) • Adjustable PWM switching frequency: 250 kHz to 2.4 MHz • PWM frequency can be synchronized to external clock • Adjustable synchronous buck regulator (1.25 VNOM) • 3.3V (3V3) and 5V (V5) internal LDO regulators .

  A4402   A4402







Part Number A4407
Manufacturers Allegro Micro Systems
Logo Allegro Micro Systems
Description 2.2 MHz Constant On-Time Buck Regulator
Datasheet A4402 DatasheetA4407 Datasheet (PDF)

A4407 2.2 MHz Constant On-Time Buck Regulator With Two External and Two Internal Linear Regulators Features and Benefits • AEC-Q100 Grade 0 qualified • Internal buck pre-regulator followed by LDO outputs • 5.5 to 36 V VIN operating range (50 V maximum); for start/stop, cold crank, and load dump requirements • Constant on-time (COT) buck pre-regulator • Valley current sensing achieves shortest buck on-times • 2.2 MHz (VIN - adjusted) switching frequency • 5 V internal low-dropout tracking linear.

  A4402   A4402







Part Number A4406
Manufacturers Allegro Micro Systems
Logo Allegro Micro Systems
Description Constant On-Time Buck Regulator
Datasheet A4402 DatasheetA4406 Datasheet (PDF)

A4406 Constant On-Time Buck Regulator With One External and One Internal Linear Regulator Features and Benefits • AEC-Q100 Grade 0 qualified • Internal buck pre-regulator followed by LDO outputs • 5.5 to 36 V VIN operating range (50 V maximum); for start/stop, cold crank, and load dump requirements • 2.2 MHz constant on-time buck regulator • 50 V absolute maximum input voltage for surges • Valley current sensing achieves shortest buck on-times • 5.5 to 46 V input voltage range • −40ºC to 150ºC .

  A4402   A4402







Part Number A4405
Manufacturers Allegro Micro Systems
Logo Allegro Micro Systems
Description Constant On-Time Buck Regulator
Datasheet A4402 DatasheetA4405 Datasheet (PDF)

A4405 Constant On-Time Buck Regulator With One External and Two Internal Linear Regulators Features and Benefits • AEC-Q100 Grade 0 qualified • Internal buck pre-regulator followed by LDO outputs • 5.5 to 36 V VIN operating range (50 V maximum); for start/stop, cold crank, and load dump requirements • 2.2 MHz constant on-time buck regulator • Valley current sensing achieves shortest buck on-times • 50 V absolute maximum input voltage for surges • 5.5 to 46 V input voltage range • −40ºC to 150ºC.

  A4402   A4402







Constant On-Time Buck Converter

A4402 www.DataSheet4U.com Constant On-Time Buck Converter with Integrated Linear Regulator Features and Benefits ▪ 2 MHz switching frequency ▪ Adjustable soft start timer ▪ Watchdog input ▪ Power-on reset output ▪ Adjustable 2% buck regulator ▪ Adjustable 2% linear regulator ▪ Enable input ▪ 6 to 50 V supply voltage range ▪ Overcurrent protection ▪ Undervoltage lockout (UVLO) ▪ Thermal shutdown protection Description The A4402 is a power management IC that combines a 2% constant on-time buck regulator and a 2% linear regulator. Ideal for applications that require two regulated voltages. The buck regulator output supplies the adjustable linear regulator to reduce power dissipation and increase overall efficiency. The switching regulator is capable of operating above 2 MHz. A greater than 2 MHz switching frequency enables the customer to select low value inductors and capacitors while avoiding EMI. Protection features include undervoltage lockout and thermal shutdown. In case of a shorted load, each regulator features overcurrent protection. The A4402 also features a power-on reset with adjustable delay for the microprocessor output. The A4402 is provided in a 16-pin, ≤1.20 mm nominal overall height TSSOP, with exposed pad for enhanced thermal dissipation. It is lead (Pb) free, with 100% matte tin leadframe plating. Applications: ▪ Photo and inkjet printers ▪ Industrial controls ▪ Distributed power systems ▪ Network applications Package: 16-pin TSSOP with exposed thermal pa.


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